Milling machine



Dec. 28 1926. 1,612,059 l H. c. Ross MILLING MACHINE' Filed Sept. 5G,1921 l 2 Sheets-Sheei l,

Patented Dec., 2%, i926.

HUGH C. ROSS, 0F TOLEBO, OHIO, ASSIG'NGR TO 'ElT-OVTENS MACHNE COMANY,Olli TOLEDO, OHIO, A COR'EORATIGN 0F EZEO.

MILLING IVAGHNE.

Application iled September 30., 1921.

The invention relates to millingI machines and it is the object of theinvention to obtain a semi-automatic machine which is particularlyadapted for the successive performance on different pieces of work ofdefinite operations, such, for instance, as the cutting of key seats. Tothis end the invention consists in various features of construction ashereinafter set forth.

In the drawings: Y

Figure 1 is a perspective view of the machine;

Figure 2 is an end elevation partly in section;

Figure 3 is a vertical longitudinal section through the carriage and itsactuating hand.

A is the main frame member which is preferably formed integral with abase B and vertical hollow column C. Upon the upper end of this columnare the vertical ways D on which is mounted the adjustable head Ecarrying` the arbor F. In rear of these ways are the arms Gr havingbearings at the outer ends thereof for the countershaft H. At the frontand in a plane transverse to the ways D is secured a bed or table I forsupporting` a reciprocatory work-carrying table J. The bed I has ahousing l beneath the same in which is located a rotary cam L forreciprocating the carriage and on a shelf or bracket M to the rear ofthe column is mounted a motor N for driving` the mechanism.

The mechanism which is driven by this motor comprises the counter-shaftH having thereon a drive pulley or sprocket H connected by a belt orchain directly to the motor. At the opposite end of the shaft l-l is apulley H2 which is connected by a belt to a combined pulley andfly-wheel F on the arbor F. This wheel is of sufficient mass to furnishan inertia element which will steady the operation of the cutter uponthe work. The carriage J is arranged beneath the cutter mounted on theouter end of the arbor F and is reciprocated by the cam L, which in turnis driven by a mechanism including a worm gear L within the housing K, aworm L2 in mesh with this gear and upon a worm shaft L3 which extendstransversely and into the hollow column C. 0 and O are sprocket wheelsmounted on the portion of the shaft L which is within the hollow column,the former being connected by a chain P with a driving sprocket F on theSerial No. 504,273.

counter-shaft H. The sprocket G is connected by a chain Q with asprocket Q on a shaft Q2 extending` outward through the column adjacentto the base B and forming` the driver for a rotary oil pump Q33.

The. work carriage J is supported upon the bed or table l and is guidedfor reciprocatory movement thereon by ay central dependingv portion il',of dove-tailed cross section engaging corresponding` ways I on the bed.lThe carriage preferably is provided with two worlesupporting; blocks J2and J3, which are on opposite sides of the longitudinal center thereofand upon which suitable jigs or work clamps not shown) may be mountedfor holding` the work. rThe supporting blocks are sh own as being formedirtegral with the carriage J though it is not necessary that .they be soformed as separate blocks might be used. Surrounding and ertendingbetween these blocks is a ejrooved portion of the carriage for receivingthe chips together with the oil or lubricant used upon the cutter. Atopposite ends of the carriage are depending discharge tubes J4 and J5through which the lubricant, together with some of the chips.. isdischarged into receptacles which in turn are connected by conduits lS/with a receiving` tank R2 supported on the base B. Within ythisreceivincA tank are trays R3 for catching the chips while the lubricantis permitted to over-flow the edges of these trays. Any chips which arecarried over from the upper trav will be caught by the lower ones and inthis way separation is effected, so that the purified. lubricant willfind its way to the bottom of the tank. The pump @33 then withdraws thelubricant from the tank and elevates it through a conduit S to areceivingn tank S from which it is discharged through conduit S2 to thecutter. Any excess of lubricant will pass from the tank S into theover-flow conduit S3 and thence downward into the channeled workcarriage from which it will be discharged, as above described, into thetank R2.

rlhe work carriage .l is reciprociated through the operation of the camL in cooperation with a pin T depending from the center of thecarriafre. This pin is preferably mounted in ball bearings 'll' so as tobe freely revoluble and its lower end is adapted to engage with a groovein the cam, suitably fashioned to produce the desired reciprocation.Preferably this groove is formed by segmental cam platesvT2, which aremounted upon a cylindrical drum forming the body of the cam L, and theplates are so fashioned that in the rotation ot the drum they willimpart a longitudinal movement to the carriage. This movement is rapidin the central portion thereot to alternately transfer the work on theblocks l2 and J3 into position tor engagement with the cutter. Themovement is then slowed so as to pro# duce the desired teedinp,` ot thecutter into the work until the completion ot the cut.

f Above the lubricant-holdirugv por after which va rapid movement isimparted to withdraw the work from the cutter and to move the work uponthe other block into engagement therewith. Different kinds ot work wouldrequire diiierent cams, bntthe drum on which these cam plates aremounted is standard.

The cam is lubricated while in actiel i preferably a housine` K has alower portion which is constantly iilled with the lubricant. the levelof which is indicated by .suitable means such as the external causeglass l. tion oit the housing` is a removable cover plate K2 which is ofsutlicient size to provide access to the cams. The worm shaft L3 isinserted longitudinally through an aperture in the housand Y, ing K.this aperture beine; closed by a cap K3. Roller bearings L4 be used forthe mounting' of the shatt L3 and an oil-retaininn ring L5 surroundingsaid shaft serves to hold the lubricant trom escapingV into the hollowcolumn C. The head E which carries the arbor F is adjustably secured tothe ways D and vertical adjustment is obtained through the operation ota. `feed screw E2 engaging a threaded socket in said head and havingrits upper end swivelled in bracket E3 ron the column C. The head E has acylindrical socket portion ll* in which is adiustably secured the rod E5which carries an outer center EG. The socket E4 is split and clamped byscrews l? which serve to hold the rod rigid in ditierent positions otadiustment.

With the construction as described, in operation, the pieces ot workwhich are operated upon are alternately mounted upon the blocks J2 andJ3. H",otion is then imparted to the mechanism fromthe motor ll, which,through the connections described, will reciprocate the work holder d,carrying the work on the opposite blocks J 2 and J3 alternately intoengagement with the outter on the spindle F. After the operation hasbeen performed on one piece of work and the carriage is returning tomove the piece ot work into engagement with th cutter', the completedwork is removed and a new piece substituted therefor. This transfer canbe effected during' the interval in which the work is being performedupon the other supporting block and thus the machine can operatecontinuously.

During the performance ot the work the pump will be in constantoperation and will circulate the fluid which is used upon the cutter.rilhis fluid is discharged through the conduit S2 directly upon heCutter and will wash away the chips, carrying them into the grooves otthe carrier and then through the discharge conduits J4 and J5 into thoreceptacles R. These receptacles are otsuiiicient size to receive thedischarge from the conduits lt and J5 during the entire reciprocatorymovement ot the carriage and as the bottoms of said receptacles aresloping, the 'duid and the chips will be carried into the conduits E.hese conduits will discharge onto the trays R2 where the liquid isseparated trom the chips and fills the tank, from which it is againdrawn out b v the pump Q2.

n the performance ot certain work, it is desirable to exactly limit theaction of the cutter. This eiiected by pr viding the carriage l at itsopposite ends with brackets lil carrving; adjustable stops U which areadapted to engage with bearings on the bed or table I. These stops maybe adjusted in relation to eachpiece of work so that it there is anybacklash in the cam which would permit the same to over-ride the desiredmovement, stops willv limit the action ot the cutter.

For access to the cam L the end of the housing` K is apertured for thepassage of said cam and this aperture is capped by a closure K4.

A machine constructed as described can be quickly adapted for anydesired semi-automatic operation and in use will perform its workrapidly and accurately. The construction is comparatively simple andeasily assembled, thereby decreasingl the cost of production.

.The series of trays in the tank R2 will hold an accumulation of chips.but whenever access is desired to these trays, the cover R'i ot' thetank may be removed and the trays withdrawn therefrom. This operation isfacilitated by providing the conduits R with telescopic extensions R5,permitting of drawing the ends ot these conduits out of the way when thetrays are to be removed.

Vihat I claim as my invention is:

l. The combination with a base, and a column projecting upwardtherefrom, of a bed supported on said column, a reeiprocatory workcarriage mounted on said bed, said carriag'e having a peripheral groovefor receivine` the lubricant and chips, a discharge conduit from saidlroove at one end of said carriage, and a receptacle stationary on saidbed, ot suilicient area to register with said discharge conduit duringthe entire reciprocatory movement thereof.

' 2. The combination with a bed, of a reciprocatory work carriagethereon having a peripheral groove for receiving the chips andlubricant, discharge conduits from said groove at opposite ends of thebed, receptacles for the discharge from said conduit stationary with thebed and of sufiicient area to remain in registration with said conduitsduring the entire reciprocatory movement, conduits connected with saidreceptacles for conveying away the lubricant and chips, a tank forreceiving said lubricant and chips, means in the tank for separating thelubricant from the chips, and a pump for returning the lubricant to thework on said carriage.

3. The combination with a base, a column extending upward therefrom, abed mounted on said column, a reciprocatory carriage slidable upon saidbed and provided with a pair of work-supporting blocks with groovessurrounding said blocks for receiving the lubricant and chips, dischargeconduits con necting with said grooves at opposite ends of saidcarriage, receptacles for receiving the discharge from said conduits ofsutlicient area to remain in registra-tion therewith during thereciprocation of said carriage, a column receiver into which saidreceptacles discharge, and separating means for the lubricant and chipswithin said receiver, said means comprising a seriesy of trays removablyengaging said receiver and arranged to overflow the liquid from one toanother.

4. The combination with a base, of a column extending upward therei'rom,Vertical ways on the upper portion of said column, a head verticallyadjustable on said ways, a transversely extending rotary work arborjournaled in said head, a bed mounted on said column beneath said rotaryarbor, a reciprocatory work carrier on said bed, a

bracket on said column, a. motor mountedv thereon, a counter-shaftmounted on said column and driven from said motor, and a driveconnection between said counter-shaft and rotary arbor including acombined pulley and {iv-wheel on the latter.

5. The combination with a reciprocating carriage and a bed therefor, ofa conduit connected to one end of said carriage for discharginglubricant and chips collected thereon, and a receptacle stationary onsaid bed of suthcient area to register With said discharge conduitduring the entire reciprocatory movement thereof.

In testimony whereor1 I aiiix my signature.

HUGH C. ROSS.

